You hold a monopoly on the atomic bomb, but you know that the Soviet Union is desperately seeking to reproduce it and it is only a matter of time before she has the bomb.
Many of your allied nations in western-Europe are presently experiencing economic hardship. You fear that chaos will strike there leading to some sort of insurrection or worse, a communist revolution.
Greece is presently fighting a civil war. One side is being outfitted with weapons from the communists in Yugoslavia. Is the Soviet Union behind this, too? Who knows! But you fear that Greece will fall under communism.
The Soviet Union has positioned several divisions of troops against the Turkish border. The USSR desires - as did Russia under the Tsars - control of the Bosporus Straight and the Dardanelles. This seems like an overt attempt by the Soviets to invade another nation.
The Russian Army has become an army of occupation throughout the lands that they liberated. This was not the deal that Stalin had struck in the war time conferences. What are we going to do?
The Soviet Union has just blockaded the entire city of Berlin. How are we ever going to save those people in the western half of Berlin if we cannot ship to them overland?! How can we end this blockade?
Most all of your soldiers that we fighting in Europe have been demobilized back the the USA. You are in no shape to use conventional weapons or the threat of them against Soviet expansionary threats.
Arrive at a course of action
Decide on how you will prevent the spread of communism and communist movements in Europe and the rest of the world. This is your time to put your foot down.
Decide on a course of action to deal with the Berlin Blockade.
Finally, how will you help western-Europe rebuild and develop their economies.
Here's the situation
Arrive at a course of action